Bed and cylinder printing press



July -c. B. COTTRELL, 3D

BED AND CYLINDER PRINTING PRESS Filed June 50, 1931 3 Sheets-Sheet 1 INVENTOR ATTORNEYS July 19; 1932. Q c. B. COTTRELL, an I 1,858,311

BED AND CYLINDER PRINTING PRESS Filed June 50, 1931 3 Sheets-Sheet 2 I 1 E 1 '1 l l I I 5| 5 14 5 16 :5 I VJHN/ 1 .u

: T I l i 16 I i 1 :r I I I 4..- l -i i i I [EJ311111 1E nuuun [U] 1]:

2% I INVENTQR o3 Z H H H BY I ATTORNEYS July 19, 193 c. a, COTTRELL, 3D

1 BED AND CYLINDER PRINTING PRESS Filed June 50, 1931 3 Sheets-Sheet 3 H ATTORNEYS Patented July 19, 193 2 UNITE-D STATE CALVERT :B. COTTRELL, 3D, or WESTERLY, RHODE-ISLAND, AssIeNonro cQBpco'r'rnE LL.

sons coMrAnY, or WESTERLY', nnonn xsnnnn, noonronnrronor nann- WARE Application m June 30,

My invention is applicable to the type of bed and cylinder presses disclosed in'my cotinuously in one direction onlyand in which the form and form rollers are separated during the non-inking stroke and are brought into coaction during. the inking stroke. In

the form illustrated herein and inthe said application the form is moved out of the path of the form rollers on the non-printing stroke of the bed and into the path of the said form rollers on, the printing stroke of the bed.

In bed and cylinder printing presses of the type disclosedherein where a motor, which is independentof the bed drive, forms a part of the inking mechanism and is used for driving the form rollers in one direction only, it

is difiicult to synchronize the surface speeds of the form and form rollers during the application ofinkto the form. v a

The object of my invention, therefore, is I to provide means controlled by the bed for bringing the surface speed ofthe form rollers to the surface speed of the form when 1n contact therewith during the inking stroke of the bedso as to ensureaperfect rolling contact between the form rollers, and form, and thus cause the even application. of the ink to the form.

My invention more particularly comprises a clutch mechanism, as for instanceone=way or slip clutches on the-form rollers whereby when the form is brought into contact with the rollers the clutches will slip sufficiently to-permit the rollers to speedup to the surface speed of the form during the-inking stroke of the bed. V v

A practical embodiment of my invention is represented in the accompanying drawings in which: i V Fig. 1 represents a side elevation'ofmy improved bed and cylinder printing press,-the

. parts being shown in the positions they as.

.sume when the bed has proceeded: part way on its printing and inking stroke;

I Fig. 2 represents a similar view with the parts in the positions they assume when the BED AND QYLINDER' PRINTING PRESS 1931. Serial N 547,337,

bed-has proceeded part way in}; and, non-inking stroke; r

Fig. 3 represents a' detail verticallongitudinal section taken in the plane of the linev III- H1 of Fig.4; I f f Fig. 4 represents a detail] plan view;*

in the p n o he in detail h z nte secon its non print- F 1g. 5 represents a detai'hverticallongiv plane of the line VI VI reciprocating form bed, the form member in .thisviewbeing shown raised into position to bringthe form intocontact with the form rellers of the inkingmechanisln onthe forward or printing, stroke of the bed? i I if i Fig. 8 represents, a similar View with the form member shown lowered into' osition to. bring the form out of; contact with fthe' form rollers on the, reverse or nojnprintin'gv stroke ofthebed;

' Fig; 9 i epresents, a transjversevertic'al secftionthrough the bedtaken in the plane of the line IX-e-IX'of 7 looking in fill? direction of the arrows; 1 v 7 f F ig, lOrepreSentsa bottom plan vi w' of the upper or form member of the bed ;j' 1

Fig. 11 represents a topjpl'an view of the lower or base member of thebed "j a r Fig. 12 represents an end. view of the; form member; and] I if Fig. m m e The .main frame of the printing;press is denoted by 1. The formbed' is fitted to reciprocate in the main frame'is shown as comprising an upper or form'me'mher 2 and a lower or base member g', e up. per member serving to carry the printing I form A: and havinga limiteddiag'onal sliding movementon the lower or base member 3 longitudinally of the press; in the present instanceby providing the upper or form.

1'3 represents an end view of base member 2 wi th an: inclined bottom surface? and thelbW-er orb ase member 3 with a. enactingreversely inclined top surface.

A. lost. motion connection is provided be:

' member 3-is provided with a front cross rib 3* and a rear cross rib 3** which serve to limit thejforward and upwardly and the rearward and downward sliding movements respectively of the form member on the base a member. The form bed may be reciprocated by any suitable means, that shownherein comprising an electric motor 5 which drives 1 motiye fluid pumps 6 and 7 having suitable motive fluid connections with their respec-.

tive longitudinally disposed fixedly mounted cylinders 8 and 9 below the form .bed.

This piston *10 which slides in the cylinder 8 I is. connected to an arm 11 depending from the front. end of the form member 2 of the bed for moving thebedrearwardlyand the piston- 12 which slides in the cylinder 9 is :oinnected to an arm 13 depending from the "rented of the form member 2 for moving the bed forwardly. .As this bed reciprocating meansformsino part of the present invenband 6.

tion' it jwill not be more specifically described herein, itbeir'ig understood thatsuitable 'mo tive fluid connections are provided to ensure the reciprocation of the bed by the pumps The 'inking mech'anism is shown as comprising an ink fountain 14,.dis'tributing rollhrs 15', form rollers 16 and an electric motor .17,which motor is independent of the bed reciprocating means and drives both the dis- ,tributingjrollers'15Vand form rollers 16 in one direction only, to ensure'an even appli cation of the ink to the form 4 on the 'plll'lt- 'ing' and inking stroke of the bed;- The dis- I ,1 tributing rollers 15 are positively driven from the motor gear 18 through the gears '19, 20, 21,

22. The form roller'gears' 23, in the present instance four gears, are positively driven from the two distributing roller'gears 24 J and each form roller'gear 23' has a one-way or slip clutch driving connection "25 with its form roller16 so that when the form 4 comes into contact'with'itsform rollers 16 on the printing and'jinking stroke the form rollers 1 16 are causedtotravel at the surface speed of the form. In the present instance the form rollers are driven by the motor 17 at a V slightly slower speed than the surface speed ofthe form andwhen the form comes into contact with the for mrollers the surface speed 'of the form rollers is increased to the surface speed of the form.

' he oscillating impress on cylinder 26is fixe uy mounted in the main frame 1 and it 'is'geared at'all'times to the reciprocating bed through the usual gear and rack connection 27, 28, the rack beingfatta'ched'to the form member 2 of the "bed so'that the form and cylinderare kept in perfect registerin "theoperation of the press, This impression cylinder may be provided with a set of tumbler actuated grippers' 29, operable through "the oscillation of w the cylinder, to take the sheets from the feed table 30 and deliver them mechanism.

tail end first to the stripping fingers 31 of the delivery mechanism 32.

;In operation: As the form bedstarts on its printing and inking stroke the form mem her will be raised by itsdiagonallyupward sliding movement on the base member due to the action vof the piston 10 in the cylinder 8, so that as the bed proceedsto the end of its .stroke the form will first be brought into contact :With the sheet carried by'the im'pression cylinder and then into contact with the form rollers 16. .,,During the time that the form is in contact with these form rollers they will be under the control of the form and will I be rotated at the surface speed thereof. As the form bed starts on'its non-printing and non-inking stroke the form member is lowered by its diagonally downward sliding movement on the base member due to the action of a thepiston 12 iri'thecylixide'r-Q so'thatthe form 35 will failto'contact with the form rollers of the inking mechan'isni during this stroke of the bed, and the form rollers'will thusbe under the control of the motor 17 of the inking 1 p v p From the above description it will be seen that the'form rollers are driven continuously in one direction only on the printing stroke by the bed, and onthenon-printing stroke by 1 the motorysimple and effective means being providedfor causing theform rollers to travel at the "surface speed of the form'when in, contact'therewith. i I

' It is evidentthat various changes may beresorted tom the construction, form and ar 10o 'rangeme'nt of'the 'several p'arts without departing from the spirit and scopeof my invention, and hence I do not' 'intend to be limited to the particularembodimentherein shown and described,- but; 1

WhatIfclaim'is:+

c "1. Ina bed and cylinder printing press, a reciprocating form bed, an inking m'echanism therefor including form rollersdriven A a "continuously in one direction only, and means I 10 controlled by the bed for causing theform "rollers to travel 'atthe surface speed ofthe.

'form when in contact therewith.

In a bed and cylinder printing press,

a recip'rocating form bed, an inking mechacontrolledby the bed forfcausing'the form rollers to'travel at the surface speed of the form whenin contact therewith-land means to move the 'form'butof'the path of the form 133 a reciprocating form bed, an inking mechanism therefor including form rollers and a motor for driving them in one direction only,

and means controlled by the bed for causing the form rollers to travel at the surface speed of the form when in contact therewith.

5. In a bed and cylinder printing press, a reciprocating form bed, an inking mechanism therefor including form rollers and a motor for driving them in one direction only, means controlled by the bed for causing the form rollers to travel at the surface speed of the form when 4 in contact therewith and means to cause the separation of the form and form rollers on-the non-inking stroke of the bed.

6. In a bed and cylinder printing press,

a reciprocating form bed, an inking mecha nism therefor including form rollers and a motorfor driving them in one direction only,

means controlled by the bed for causing the form rollers to travel at the surface speed of the form when in contact therewith, and means to move the form out of the path of the form rollers on the non-inking stroke of the bed. i

7. In a bed and cylinder printing press, a reciprocating form bed, an inking mechanism therefor including form rollers driven continuously in one direction only, and a slip clutch mechanism controlled by the bed for causing the form rollers to travel at the surface speed of the form when in contact therewith. I

8. In a bed and cylinder printing press, a reciprocating formbed, an inking mechanism therefor including form rollers driven continuously in one direction only, a slip clutch mechanism controlled bythe bed for causingthe form rollers to travel at the surface speed of the form when in contact therewith, and means to cause the separation of the form and form rollers on the non-inking stroke of the bed.

9. In a bed and cylinder printing press, a reciprocating form bed, an inking mechanism therefor including form rollers driven continuously in one direction only, a slip.

clutch mechanism controlled by the bed for causing the form rollers to travel at the surface speed of the form when in contact therewith, and means to move the form out of the path of the form rollers on the non-inking stroke of the bed.

10. In a bed and cylinder printing press, a reciprocating form bed, an inking mechanism therefor including form rollers and a motor for driving them in one direction only,

and a slip clutch mechanism controlled by the bed for causing the form rollers to travel at the surface speed of the form when in contact therewith.

11. In a bed and cylinder printing press,

a re'ciprocating form bed, an inking mechanism therefor including *f-orfm'ro'll'ers, and 'a motor for driving them in onedirectiononl y, V a slip clutch 'rr' ech'anism controlled by-the bed for causing the-form rollers totr-ave'l at the'surface speed of'the form-when in con tact therewith, and meansto'cause the sepae ration ofthefform and=form rollers 7 12. In a bed and cylinder printing a reciprocating form bed, an inking mechao-n -the. non-inkingstroke of the bed.

I press,

nism therefor including form rollersfand a 1 motor for driving thenrin one direction only, i

' a sli clutch "mechanism controlled .by the bed forcausingthe form rollers totravel at. the surface speed of the form when-in contact therewith, and means to move theflform out of-the path of the form rollers-on the non-inking stroke of the bed. i

13. Ina bed and cylinder printing press, a reciprocating form bed, an inking mechanism therefor including form rollers driven continuously inone direction only, and slip clutches on the form rollers, controlled by the bed for causing the form rollers to travel at the surface speed of the form when in contact therewit 14. In a bed and cylinder printing press,"

a reciprocating form bed, an inking mechanism therefor including form rollers driven continuously in one direction 7 only, slip clutches on the form rollers, controlled by the bed for causing the form rollers to travel at the surface speed'of the form when in contact therewith, and means to cause the separation of the form and form rollers on the non-inking stroke of the bed.

15. In a bed and cylinder printingpress,

'a reciprocating form bed, an inking mechanism therefor including form rollers'drlven contlnuously 'in one dlrection only, slip V clutches on the form rollers, controlled by the bed for causing thef form rollers to travel at the surfaces'peed of the form when in contact therewith, and means to move the form out of thepath of the form rollers on the non-inking stroke of the bed. I

16. Ina bed and cylinder printing press, i

a reciprocatingform bed, an inking mechanism therefor includingform rollers and a motorfor driving them'inone direction only, and slip clutches on the form rollers con trolled by the bed for causing the form rollers to travel at thev surface speed. of the form when in contact therewith.

17. In a bed and cylinder printing press,

a reciprocating form bed, an inking mechanism therefor includingform rollers and a motor for driving them in onedirection only, slip clutches on the form rollers controlled by the bed for causing the form rollers to the non-inking stroke of the bed; p

travel at the surfacespeedof the form when in contact therewith, and meansto cause the separation of the form and {form rollers on 4. 18; In a; ibedgand oylinder printing press, a, .1reciprocating-form bed, ,an inking inechanism therefor including form rollers randxa motor forldriving them in one direction only, x-sli 'p clutches on the form rollers controlled by the bed foreausi g the form rollers to travel at the surface speed of theiform when in contact therewith, and mea sto move the form out of ther path of theiform rollers-n lfilthernon-inking Stroke. of the bed;

In testimony, thatI claim the foregoingas .;my invention, l haye signed my name this thday of June, 1931. .l M; V 715' CA V R COT BELLB D- 

